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Browsing by Author "Parthasarathy, M"

Browsing by Author "Parthasarathy, M"

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  • Infrared properties of planetary nebulae with [WR] and wels central stars 
    Muthumariappan, C; Parthasarathy, M (Oxford University Press on behalf of the Royal Astronomical Society, 2020-03)
    We report the infrared (IR) properties of planetary nebulae (PNe) with Wolf–Rayet (WR) type and wels central stars known to date and compare them with the IR properties of a sample of PNe with H-rich central stars. We use ...
  • IRAS 17395-0841: A New Young Low Excitation Planetary Nebula 
    Vijapurkar, J; Drilling, J. S; Parthasarathy, M (American Astronomical Society, 1997-10)
    We report here the discovery of a new young low excitation planetary nebula IRAS 17395-0841.
  • ISOGAL: A deep survey of the obscured inner Milky Way with ISO at 7 mu m and 15 mu m and with DENIS in the near-infrared 
    Omont, A; Gilmore, G. F; Alard, C; Aracil, B; August, T; Baliyan, K; Beaulieu, S; Begon, S; Bertou, X; Blommaert, J. A. D. L; Borsenberger, J; Burgdorf, M; Caillaud, B; Cesarsky, C; Chitre, A; Copet, E; de Batz, B; Egan, M. P; Egret, D; Epchtein, N; Felli, M; Fouque, P; Ganesh, S; Genzel, R; Glass, I. S; Gredel, R; Groenewegen, M. A. T; Guglielmo, F; Habing, H. J; Hennebelle, P; Jiang, B; Joshi, U. C; Kimeswenger, S; Messineo, M; Miville-Deschenes, M. A; Moneti, A; Morris, M; Ojha, D. K; Ortiz, R; Ott, S; Parthasarathy, M; Perault, M; Price, S. D; Robin, A. C; Schultheis, M; Schuller, F; Simon, G; Soive, A; Testi, L; Teyssier, D; Tiphene, D; Unavane, M; van Loon, J. T; Wyse, R (EDP Sciences, 2003-06)
    The ISOGAL project is an infrared survey of specific regions sampling the Galactic Plane selected to provide information on Galactic structure, stellar populations, stellar mass-loss and the recent star formation history ...
  • IUE and ISO observations of the bipolar proto-planetary nebula Hen 401 (IRAS 10178-5958) 
    Parthasarathy, M; García-Lario, P; Gauba, G; de Martino, D; Nakada, Y; Fujii, T; Pottasch, S. R; de Cordoba, L. S. F (EDP Sciences, 2001-09)
    We present ultraviolet (IUE) and infrared (ISO) observations of the bipolar proto-planetary nebula Hen 401 which, combined with previously available optical and near infrared data, are used to reconstruct the overall ...
  • IUE observations of high galactic latitude F supergiants HD 161796 and HD 187885 
    Parthasarathy, M; Pottasch, S. R; Wamsteker, W (European Southern Observatory, 1988-09)
    Low resolution (6 A) IUE ultraviolet spectra of the high galactic latitude F supergiants HD 161796 (F3 Ib) and HD 187885 (F2-3I) are analyzed. The UV spectrum (1250 A to 3250 A) of HD 161796 shows no excess UV flux ...
  • The IUE ultraviolet spectrum of PC 11 
    Parthasarathy, M; Pottasch, S. R; Clavel, J (International Astronomical Union, 1993)
  • K-band spectra of selected post-AGB candidates 
    Parthasarathy, M; Muthumariappan, C; Muneer, S (Springer Nature, 2020-07)
    We present medium resolution (1000) K-band spectra of 12 post-AGB candidates and related stars. For several objects in our sample, these spectra were obtained for the first time. The Brγ line in emission is detected in ...
  • Late-type giants with infrared excess. I. Lithium abundances 
    Jasniewicz, G; Parthasarathy, M; de Laverny, P; Thévenin, F (European Southern Observatory, 1999-02)
    de la Reza et al. (1997) suggested that all K giants become Li-rich for a short time. During this period the giants are associated with an expanding thin circumstellar shell supposedly triggered by an abrupt internal mixing ...
  • Light curve analysis of Hipparcos data for the massive O-type eclipsing binary UW CMa 
    Antokhina, E. A; Srinivasa Rao, M; Parthasarathy, M (Elsevier B.V, 2011-04)
    Hipparcos photometric data for the massive O-type binary UW CMa were analysed within the framework of the Roche model. Photometric solutions were obtained for five mass ratios in the q = M2/M1 = 0.5–1.5 range. The system ...
  • Light variability of color selected IRAS sources: variables in late AGB and early post-AGB phase 
    Fujii, T; Nakad, Y; Parthasarathy, M (Kluwer Academic Publishers, 2001-08)
    The transition from AGB to post-AGB stars was investigated using the H-band monitoring of these objects for four years. The Mira-type pulsations were found only in the restricted area in the IRAS two color diagram. The ...
  • Line identification and photometric history of the hot post-AGB star Hen 3−1013 (IRAS 14331−6435) 
    Arkhipova, V. P; Parthasarathy, M; Ikonnikova, N. P; Ishigaki, M; Hubrig, S; Sarkar, G; Kniazev, A. Y (Oxford University Press on behalf of the Royal Astronomical Society, 2018-12)
    We present a study of the high-resolution optical spectrum for the hot post-asymptotic giant branch (post-AGB) star, Hen 3−1013, identified as the optical counterpart of the infrared source IRAS 14331−6435. For the first ...
  • Line identification and photometric history of the hot post-AGB star Hen 3−1013 (IRAS 14331−6435) 
    Arkhipova, V. P; Parthasarathy, M; Ikonnikova, N. P; Ishigaki, M; Hubrig, S; Sarkar, G; Kniazev, A. Y (Oxford University Press on behalf of the Royal Astronomical Society, 2018-12)
    We present a study of the high-resolution optical spectrum for the hot post-asymptotic giant branch (post-AGB) star, Hen 3−1013, identified as the optical counterpart of the infrared source IRAS 14331−6435. For the first ...
  • Line identifications of type I supernovae: on the detection of Si II for these hydrogen-poor events 
    Parrent, J. T; Milisavljevic, D; Soderberg, A. M; Parthasarathy, M (IOP Publishing, 2016-03)
    Here we revisit line identifications of type I supernovae (SNe I) and highlight trace amounts of unburned hydrogen as an important free parameter for the composition of the progenitor. Most one-dimensional stripped-enve ...
  • Lithium abundances for early F stars: new observational constraints for the Li dilution 
    Jasniewicz, G; Recio-Blanco, A; de Laverny, P; Parthasarathy, M; De Medeiros, J. R (EDP Sciences, 2006-07)
    Aims.To investigate any correlation between Li abundances and rotational velocities among F-G evolved stars, we study a large sample of early F stars from the Bright Star Catalogue (BSC), most of them classified in the ...
  • Lithium and rotation in F and G dwarfs and subgiants 
    Mallik, S. G. V; Parthasarathy, M; Pati, A. K (The European Southern Observatory, 2003-10)
    Lithium abundances have been determined in 127 F and G Pop I stars based on new measurements of the equivalent width of the 6707 Å Li I line from their high resolution CCD spectra. Distances and absolute magnitudes of these ...
  • The lithium in weak G-band stars 
    Parthasarathy, M; Kameswara Rao, N (D. Reidel Publishing Co., 1980-11)
    The lithum abundance in weak G-band stars is found to be linearly correlated with CH deficiency. Weak G-band stars with a high Li abundance are found to show relatively least carbon deficiency, while the stars with a ...
  • Low resolution spectroscopy of hot post-AGB candidates 
    Parthasarathy, M; Vijapurkar, J; Drilling, J. S (EDP Sciences, 2000-08)
    Spectral types are determined from low resolution optical spectra of 40 IRAS sources with far-infrared colours similar to planetary nebulae. The presence of circumstellar dust, high galactic latitude, and early supergiant ...
  • Low resolution spectroscopy of IRAS sources with PN like IR colours 
    Vijapurkar, J; Parthasarathy, M; Drilling, J. S (Astronomical Society of India, 1998)
  • Low resolution spectroscopy of ISOGAL sources: Search for early-type stars with infrared excess 
    Schultheis, M; Parthasarathy, M; Omont, A; Cohen, M; Ganesh, S; Sevre, F; Simon, G (E D P Sciences, 2002-05)
    An analysis of low resolution spectra and infrared data of 29 ISOGAL-DENIS sources with mid-IR excess is presented. Eight ISOGAL sources from our sample with 7-15 mu m excesses are found to be B and A-type stars, some of ...
  • Low resolution spectroscopy of selected Algol systems 
    Shanti Priya Devarapalli; Rukmini Jagirdar; Parthasarathy, M; Sahu, D. K; Mohan, V; Bhatt, B. C; Thomas, V. S (Springer, 2018-04)
    The analysis of spectroscopic data for 30 Algol-type binaries is presented. All these systems are short period Algols having primaries with spectral types B and A. Dominant spectral lines were identified for the spectra ...

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